From 9fca99b8b28faa36713e969473aad799d52a115f Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Tue, 7 Apr 2026 21:31:59 +0200
Subject: [PATCH] git-annex: work around test suite race condition w/
 tasty-1.5.4

---
 pkgs/development/haskell-modules/configuration-common.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-common.nix b/pkgs/development/haskell-modules/configuration-common.nix
index 26f852cfa73e..0f856d32f183 100644
--- a/pkgs/development/haskell-modules/configuration-common.nix
+++ b/pkgs/development/haskell-modules/configuration-common.nix
@@ -722,6 +722,13 @@ with haskellLib;
           --replace-fail 'InstallDesktopFile $(PREFIX)/bin/git-annex' \
                          'InstallDesktopFile git-annex'
       '';
+
+      # Work around race condition in test suite exposed by tasty-1.5.4
+      # TODO(@sternenseemann): make testFlags arg usable with git-annex
+      preCheck = ''
+        ${drv.preCheck or ""}
+        appendToVar checkFlags -j1
+      '';
     }))
   ];